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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '72d89cae9358bfa9b3fec67baa6de0f7e9aacba1c0f08d993dc23ece713a6103' 
  AND token = 'ZDf1xYXY5w4GSLqwk5rymLYwLx0MA88a/qi6MsNcdBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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