Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c42a0a0ea86c061031276543a0df4fee62745f79379f56c10a30df165564c972' 
  AND token = 'gRDY9kgyx+HxzXeAZpBmdYlZG2I6lI8d9keIopJ5/Io=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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