Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f36151d7e64c232aa5fddcfce0079c5174bb0ab0866401e03a337e84bc97239' 
  AND token = 'yS3ttSvqYIeXRbB/1sWgRtTaH7aA1+BkDtdCzqihBr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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