Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '30f62955557b70c67777b38804eeb28853f0c524d3d47fad9409b0a9e1a2ddd9' 
  AND token = '0snalBxwzhRX7H3SRhX7p2hAeyj4F/rNvUPXnKkWTyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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