Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '462c120269659878f4144af29eda2c6b0eb5823e371fdbaa29bb63f4376f66fd' 
  AND token = 'dpwhB08DbUEJELa+dWx3FWqdZ9pj7xIEsD959p60yCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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