Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e335a6307b50780b8b5720b335046ebe0086075eb00e6db94e11c0b1371d1183' 
  AND token = 'etYXrTv7yCh+ZNLUPiXGk7WIWoDU/v57/hPuPDqihbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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