Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf593c8f99e003ef1e2c769ddc418a8c1ec61f814d28fcd0c3cc65a32c3bdb73' 
  AND token = 'rOxXJUUu52V4ctfdQlM1d3u61OosFiQWkjyueZRef/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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