Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2253de67afebe3a3696ab0475abb15c5fffcd6eef9ba1cb79b2f3362dc3d63c6' 
  AND token = '//Sjw3eTkaQm93d8r8RfmkMM8wSeSPy6WdFdEKMpyhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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