Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26c30ee594c9cee8cc1b03ad8cf4c21156ab7d6c19fe43f46a8eb1f8de85198d' 
  AND token = 'MlYFrEp+PozUM8plLv5127cqPZZk1EE7vT0+1eTLUek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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