Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4da184ffd911ac1ada0aa23eae97a80ba37a60e837e71acf967f500cdd5dc752' 
  AND token = 'Yb1Vnc4CqvnvAz1U42qeOdnaNxuoBByE5NqMR847GOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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