Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a922d7b30a6c59097c24ff5e594ff5592628ba2bb132254ff3c9d052d1386cbf' 
  AND token = 'D8qc/wGQ1uV1ChiTNB0KprPI1RY2rQ3boLDXN8WubUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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