Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccc814736bf9530b8b667fbd2611e1e1a57cc1a00705a4339cd3883363c62a2d' 
  AND token = 'VqyI6yn69bYoVsbIOac7QaNeYc6mszH/fq96UU3T2xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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