Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '27b56ff89234d358efa1eb2664833573f69ae329e505521df237fbf834432873' 
  AND token = 'AS7QYCH3nmCjomogr/KNiXzPfTrZVkYErlHy9IQItPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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