Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '143a3ec4c1aaadaec4b0b24800ee700d63af4b6693c80b4672af2b2b81a7e752' 
  AND token = '/V7KQbhoW186xZS3DFBd2AuXy06EqNdU3mTKBke2v9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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