Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de0290b795f687bf2646cf4a64c7248752d05d9b5f80a7e41b971a1ad6aa723d' 
  AND token = 'W/4FDPU2jekptxbF4KcbveAobsmWLPa1OxDKV3qP+Lg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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