Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '372eb6c6daa77c5af7ef11f1d592cb7a101d6bb6acefc24fe489f6d1aa9bab00' 
  AND token = 'clYkbYlP1NgSJuhuUBNECsYi4OYhOKnVj49UQ6JsLd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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