Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a01e3736c7dfe355680d5a535e1c52d16304f4f098476062e659d9c30b7011f8' 
  AND token = 'mjQQexLTBvoh20ao6ZPFsn1R9aGSL5XjSwjADw2K9SI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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