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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00afa814c12c0901adb9fb20be75b5696787117b34f870f976d69a02df7a3bf4' 
  AND token = 'xJsB4pF/y2QDaHJ2LKvxSu7vJA799p3A3EvN5ZvSMko=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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