Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfe61fc57347c05e37304de6d93b8589a81588eb010a8750d3fea4c2e497588c' 
  AND token = '+X0IpW/XYqp2+41ccLdkNFDrsjEcjn3mPO+mRZ6XEs4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}