Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f731dac13374ff4543bb28dddea7c6a7c93ed21456878faae0f8c6ecb3e27280' 
  AND token = 'f+gEk+xlyTUi6QensmKYchprHPxhCTT0h417bA7BN/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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