Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4044c77672d1fc434808938ba6b98e4097c8e9fbc791c9dde5730171fbe13c64' 
  AND token = '9sA3aKSrTqtd7SKeMWBblqND4z8GzFhXuhzNy5oYLWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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