Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1f66a57893367e296384ecde58c7714e59b9f3f1a0f2d0d2726d2d70dfa4d3b' 
  AND token = '7yL0+DGTQ6jSx489nb6tMn44OTT54ov86+BKmr0qtXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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