Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ebb9c75c44c5e9e8809fdd54d2c8241dc58d7a90da354ff06a324d66053667c' 
  AND token = 'ok/+5wbX62qLKaqm+9fkovoxoofKs1C6w967JiDl4Hw=' 
  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"
    }
  }
}