Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3766177435faa520dfb5e70cad70b1ed80e97a827e5c9c121f9f9c07698d86b0' 
  AND token = 'i0nx6OW/59vvywG/ECVXe0ZCtphDw/zdv4Uuu61hv/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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