Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7e93e1e72d9728f935998baf8cc790771cd7de6d99116f085a10531943b4808' 
  AND token = 'kBBpUg3jsVNOKr/eoI4zTptzzj/gikgYzA7Etl9vKEo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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