Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73a260a5a394fe13146b5c06fab41b59ee341274548ca919d8edb7d8702ad45e' 
  AND token = 'ekU0tEsWqF5GrAQ5cY4ibEc4UDyJBgfHjoPabXd11vQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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