Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0c2de4d013fe87eb1c9483b7edd694090ab16a3f2f45294c569df15ca6ec5d98' 
  AND token = 'KLucZCctLpkPpXIiCqxO37QgQpDAb9BQ/OxmxxfMehI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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