Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34d4bb7cb4cf8448f33d43937ff27a17b9e2f180be224ce2f725e9f3fb138d97' 
  AND token = 'ApsBZEurVYaSZGrHA2E6/+w9uOGiRdRiNlWc11pDxfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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