SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09a706dd7ff4c97239c9dfe1256c65afbb0cef341832e0bd31a1d7a86abdd096' 
  AND token = 'v9FMLruuJ/8hupNH/UMhIO6vswhVgV6YJS1MaY6JOQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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