Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce2a78b926266a61ec798015489624218023ded6a60726a70407f109bd4a77b6' 
  AND token = 'ViUDuTb2M5+DLupfUPAcTnqOfyp7yNMFN6o5UhQii1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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