Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fcb6689304e0a11b94401b4d61bda4ef31b4f8d36644ca040842472f06aa4ec' 
  AND token = 'v16pKjgmM7STZ39RUN5LRZ9gxFlTzrJU83k1SIKX33o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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