SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e15c1c79606fd13764901b056014d19a244f93a51e71b2658c19bce6d321a177' 
  AND token = '2lcrKBwOV1v8MVdI/lmJrirFI3GTInnws+RyuOo8Vgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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