Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'da61428f8e5eec898eba301d170659899646e5f160ba0c446e753912c51add2e' 
  AND token = 'Zc4GD/w2M0dGN/DOGmTNNDtHZEEasD8MgKtUsf22FqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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