Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '285865806b250ef3fac6f30381d10d926a8f315975e4fcab5bac3622480557db' 
  AND token = 'x+sX/ng2oYstegiti889LNRfbYtRE6Rv1MLRW4XIr4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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