SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f95fd9f3cb5a4f9ff937530870d4bbdb7ad0dc7ca3d5c07f95d891d6adb9c51e' 
  AND token = 'jLL9L2mgZRwDG34w8Nyb4ohJFWYA//cvqgpfGAuhNvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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