Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a81be66595cb7e9cf74dab35c596a0f16fc5c48b8994ed04ae68c62687140a3c' 
  AND token = '2GLgHRIwclgHN7VQ0J+v1GwKWkPSAnere8y28feKgLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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