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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbd1cd218ef90b1f5d06a09b2cf9e1c92f0956cd635f4551d2132a0e6a187e1b' 
  AND token = 'jjUkxq5hXn1bIW+eurHQ14hBYBlU8+rE/clQX2ryRdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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