Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1ab0ec86dac0eefea8e3bab8629e27e35ae961e34d7c3ddaeb3292f0691308f1' 
  AND token = 'vUXomWlXN6V66Zz6tITs3MQ5ZZ5GdqvBgMjvoYEfZyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}