Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82451353cd4932377fc2fa3ab16d010b6a354a24770662cb967e9545e6b35710' 
  AND token = 'cI8vq+8rSk5h6XAHUjRuAy5YAXyptBhvQF7zSCvqSzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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