Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'df2f60bb676fbb56dc30c9b9b3bf9366e9cb58df24007ce11e5430746e2f4923' 
  AND token = 'orkpbCuwIoaM96lDRqRdhX9FqbCGvCoPysQCXGd9+Oc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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