Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b64cff54a5b8c599861f0f1e257d414e727a816a164c85b66bdb44b960efe8e9' 
  AND token = '8dnJ1k+RA8p4PnvsAqhJOWgoRXcmlOabERF8Ttg49Xs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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