Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'ba97a224ba74420cee616dbafb05b98ea21b793f384e1fc810dfec457489cd11' 
  AND token = 'fPqREewqK72SPjRbMbmf1CjrnJV0WZ1osoqkbpzeNHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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