Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c57c8fb41134f5465cae4490b82c0f2a2d0f0565b9004457439a5fdf3f6b026' 
  AND token = 's4rvcYD1id2UWJRg3VGaSd5aamGIemzP3V01cQOmODw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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