Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e59f4eb45558c90bf59575f91cf581aa865a28d68e410181c375cda3ebc81352' 
  AND token = 'A8nU29BgB22CB+Jd2NtB8vFpNLPBVNrfiMlOvGqQIlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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