SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f1163d5a0d582c14e275831bf9f04d8765d9213106a620f3f6b377b7ece3255' 
  AND token = 'zN6hgZPhbWPhzDtGHyyzHbKhvBv0rnoxl88TyKVtnrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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