Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4e809fcfd77abb2c8882d476c054804f7f73ab4db87bc45d72ba03e10711a4bc' 
  AND token = 'KZJAwKW3mZfkmelPQx2SPGtNudJSgFcQi1XG23S/GEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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