SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '440ebff97953d59f51c97c5148f5918cc582e73c5c2990201b5b03a86dec970a' 
  AND token = 'mQN2CzLCa3eB+AprwMG1lDJJTw2KyIPORqG6RTFe7zY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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