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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4701df3fcaf47cae6b7093fd90f55e1491b78e7f6ab28f51d6ddf1909a3d9745' 
  AND token = '4uxN8jgVgbQDS9cpHhVsNObaAi6vsIEQBlBouJqs098=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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