Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a89633b48db5dcdae433a06686aec2f61bff6419bc2ec34b63d3d98b90594a15' 
  AND token = 'gbuXGWL3drVC0wqN+I5b2mTfr4y5hkWCUqxZ7CEuy3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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