Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d0147ee71c0f092da87d56cc6b512f262db81ffd97f4130d4c12f1c320729a4' 
  AND token = 'Bz4aOylNyo0XbQMSGkn+bnH1FEMVieUgzVpbIMFmUZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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