Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '926af821bf82c5f4b9010c7cd0efb68e163a4667fc6a1065e8a96a83f4832016' 
  AND token = 'r8acP/4VtVM+LxN9NI/gHL8hA3vZv3159HI2bvkJ+Ic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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