Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6826d9ef6dff2dcd0b8250b2b86e047f8dd8e88dd359b2409e87a2edb0ff05b4' 
  AND token = 'gbmMQ4bpAACycGbNLUS3Lpt8ebqUoqqt2Pc63bcFhSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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