Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b6c9ec5143f75285e35d5bb87f0539bd47e4c87f23c7b0e69203415eeddb476' 
  AND token = 'XThGf4xRHKvJTGnUsMRa2vPdsQCIezDK7xfTFmCR3Yo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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