Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0045b27a1862f5b0420f14203be99658d0b2113cc6c4040990377d6208e60f4' 
  AND token = 'XPMncVcK2Y+sGcIMfcRz9uZtmJ9TaSAVuS0ioBG/+Qk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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