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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '410f636af3a07e03736fc0aca6d450b61d30b474866fc31ccefbbde8d2d720c1' 
  AND token = 'P64AtY4JOf/k18jSNuHEiGPuUMgyRLcxPB/e2fOKjZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}