Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46456786805839dd89445ea5f09cff3d85f5a36f523fd8972a1e34787e06c98a' 
  AND token = 'Uc11Ju8V58RWlEVY+W2cIeU3r4KwdK909q08qY1EvT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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