SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '469de05770d3e53d73b68993f5e811102675bd392434f4778ba91607ab098262' 
  AND token = 'wJxJNMN6efeKwNuTF1V9hR0sVN+z/m84siHlmqaEISk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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