SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd113bb57f545e7457f7a8bb81c4b871258c894e224568bf3b0af31ed4c2c2856' 
  AND token = 'oKQTwht62vt9VP0quFUjioHJZ87/UJGzH5sbx65fBTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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