SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0aed6dc6d6089aa390fc9a70b5224df409f1eed7c8a7065f6821e964a735ef18' 
  AND token = 'Mh/JlX0Pf1ZO/PCgvdS9HI+AqFa7Lih2vuahgRCpTWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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