Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6be10138e9106dd2cd43dc263a67f51923eb60c10481d3739e4e63f747cd0a46' 
  AND token = 'CmA6f1TtrB8ROoYwQ7bhZbT8UPJTvwhoL3Bt+21VGOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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