Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8eba5cef1ccb4992348160919815393b6b81e0792e0af63c95ef35cc31a34bdb' 
  AND token = 'WCbJ+hF3rCT0or8+A39hXkCpzTc6SauyiCvKY55eOwQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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