Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '348fef564af56104b62909617a6b6187a4864b2fad5cc1e3099bbcbdc521acd1' 
  AND token = 'B3OO+X9aGNLC9ufZQMB7L7dKYG1quaL4yg1KSQXQxn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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