SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e162f782c80d1ab8ace439abd37cfb93a81530122974ac47ff98f5504d65375' 
  AND token = 'Dh5k2vR2VZtG6Ci2uVluYk9jXeE5qT8jbOh9ZjFjapg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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