Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4d74aa451af275a95b00351bf3e067e8c00ebc4ecad9f51e1c224657ff16f4b' 
  AND token = '7bGsvwc6+pG+oeT6q4yKE+04k1QYNckaOlGAhgffpVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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