Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ba83572683e91f981714c4734e757dfd6bf854ad6738acdfa83901538d67f80d' 
  AND token = 'RIrRtDaUnY9Y824jty8v591DWsJdC8+xi65oI2oQ+S0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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