Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '531e57f72e067fdc3a40b837c48b77a98747252490c818d9a87684b2ef28c136' 
  AND token = '2bkjKaUfkSxpmuFwdnTjZ7e4b8YRZCVZUjNR3vqFDsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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