Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9d1d1e755bbd2e22391c2a481e1dd6e767babf45e9d210f58bafa609fe958f4' 
  AND token = 'lF48W/s/0GrGXFQ+rbEq7iHk0ugbWSaCsGSKLdvS4es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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