Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66d53ce3f1b5047d04c5e6512c7fbca21867d8bd7d4992731a6caf7c3fcf2f2d' 
  AND token = '5Gu7teqKjXMbw4I958Zb87aHQL4k3IwUii7U6IfBnWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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