Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ff52541b00d6b48d5a50eba2ea1a96ae7c2063be3c8bd78a87d9e72730d3536' 
  AND token = '2tEpgIq9ShRDNE12GQtkrs63aOCAYl19uclMpRDW5wI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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