Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '60c7d981755106094e4e9a254093b4fc20ec271de291b448a3ff32dcc121ceda' 
  AND token = 'E9F4/+4tUqwSvfWawcDR66eET6EL4ZZ5zuZvSxyJnQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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