Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88c5ec084fd9351a077654d56b1ca328edb0476e0c3e7e32028894e63e7763dd' 
  AND token = 'sVNy9gy6qQl1GnnM2KTQE7I/bXo7Vd/dXhBZvlAU6IQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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