Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17b38c807b863c9d3f0ed4aa643d6bad09eae75ecc98db652cf49f498469a7ed' 
  AND token = '4iNGAEcwuAQt9igcqMtswfF7y6cb0XVBmRsMPo/6WGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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