Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '043b7135c0d25ee826fb8397c36d4397af40d1ae14e04ba9b6f82bb0fd746436' 
  AND token = 'FD4RIygwt9t1aJnTu3WpGoRidJOlxxLdlbyFnXnyWLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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