SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7178fc8db938970ed790c63ba2c384d69397241fbbe704e40beb634d9e44c58e' 
  AND token = 'aIv6kN9xNWqr9KjVAllFuhYh0f+g0xfUBeMKIFh5XLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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