Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4193457ee727ca1d3e29d7f97950321958051d5ee5c5bdbb58e466403680cf9a' 
  AND token = 'sRSwd+cXaYu5BSz9jUT5CD5cSBIEKd7e03nRitK+B4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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