Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b01d73f999a52c899de8fcf477235f5f15511cd1e5292fb2db80ef73a484065d' 
  AND token = 'QiPCoV+r8ZlnvL4d63lkzULPylpukMXY5maHyqDd8hk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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