Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e56679bb7e51bda986d1d4cae748f29130e98acbbf9643a039fe35db1bd0c7a2' 
  AND token = 'jaCBFXkzv25XgtdUIAi59xZYY5TdDeEeBwrKlafNqUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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