Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f4ad2908dd866e993e39d3597de92a94c5efbec8280036a456889fe4a3948d1' 
  AND token = 'LyuqkhwY0oGRD4R2eAdXRIq+V4z4YMsvPriWM0uMeEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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