Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd949a6cd019a510f8b1bc43ffe434f68f819433ad96eac0221a0c1fb0c812a20' 
  AND token = 'ned5gP1KDSozt+4Wc7pHiqizNkkhccStlQ8SeeRSxnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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