Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8da65ab702a857aaff19fb055a802fde40f470d28fea0c70c62ae40d2996085' 
  AND token = 'T4VFcFQZFDZMuE8Lbtj18OD6jyirYCULR8S1Z4xm1lU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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