Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3b27637581ea28361f57aabdf06939b23ceda81e76f1365ad4721f71e8030127' 
  AND token = 'dgMDnoeXK1NrPtvNzLpehOByn/8c3QUHCD78v7plDYg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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