Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '971b82bcc0fdf838f6d5c6827bbba3020aeb00be1b306b2288927336057200e6' 
  AND token = 'dSs74iBtDp31HrAf7Ch0qaOquTBsTA2Xnu/wWolB7xo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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