Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f92bd7fba975430862cc9b14bbf13dbff4013886e74c61d42889cd0aeebca7c0' 
  AND token = 'c8xF6W2Wy+rWUIDpjTZP8XZ+M3Uyin/4roLENisAoZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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