SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4cf33d7205fe9734cad7766df8c8214772fb505c3fa0b693f2fd8bcbcbf6e1fb' 
  AND token = 'waFKns7gTgnYlihBXGc+W+Mj6ODAg+4elfoxRMPY63Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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