Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46374533aed0bfaabc32a6b99c8e76b757e8931ac1922f23a86efc7c05390930' 
  AND token = 'OZ0uJl9K1vj1XKJ34dkyU9hDn684zyeu4bOiWSVyN7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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