Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e05ba10507c6fbc66af43465716eb9d4100dfe478d95218604f2ae4424d2fdcf' 
  AND token = '03AL53cev4BQqcr6/hVs6JetUIDds1qCe4rP3Xioo8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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