Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '940f634725ac891458ecbbeef24fb1cd117ca394904d2d4fae3143680fd24cac' 
  AND token = 'TiB9/lsIgP114Dy9li8W+X4URugx1zHSiqm+kbRKHoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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