Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16a43bd472bbb59e7c07af0e3c59db01c193073b3d68545ecc09aae03ac24cab' 
  AND token = 'ysqQVPD4RkCBXc+KLySV6WuMiPRkGRrhrs6D/d1/ozE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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