Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8f39f18383cf1b0be8c13a9a825e1136db54895aafe238e089b8bfe3afbbdc9' 
  AND token = 'TFPxSRQBVBPDqrt5xr0gpfZvZSDIrQwPj8tOS218Kyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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