Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a75c74e92b86c22699e5b732c70ef1bd315b02b46f60846564aaa8d43b308a45' 
  AND token = 'j+3OaN4axyn0YYHUDFOICEyx641kf/4s3jQDC6bXm0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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