Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2468726f0fb7a05191618d6e47c745c023490af3dd04d9f70442256b83c2b712' 
  AND token = 'Ka8z/aJs+9VReLgRVyxlbiS0deblvLAN0/hZomJa6VA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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