Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '553316510dbad4a1d8252b853061274881b5f748852a871b433a01282b7e0da5' 
  AND token = '9ovPZo/2o694L2Og0r5SEQ51gVS6mUkijS/Xlm46nIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}