SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e74c5f5303b313ae7d34cbcbd41f7d26a7323425192e29fe223b541ea8fa37a' 
  AND token = 'kqzZN/EZ5Yuo7FdiKhUYPwJM8Fw+oIm7aSgnSL0VpEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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