Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f2a008e703ad7f06a3516a376f1771636b257fe6326e3af8a3465d0a9708923' 
  AND token = '4c76os+N8DE8MODleeMYZfGyBv7KTASHky/dOAsmdVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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