Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '850a85ad8eb4756d1a1c373cbe3ac05ab2bd34d4aca801c4c0310960e919b3dc' 
  AND token = '74XYYShzsj3418M4XUq8g0wOJ/Gf0s3+4W3KqLpWviw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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