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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '96d04e78df5ec0c5bde97482ea33bb1085f0b8212acc39a31f8c19b3fd30ad18' 
  AND token = 'UcPurXtm0k7GWqp0l+hahfhdWCx6qXg2h9gRoFHLA8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00083

JSON explain

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